type 1 hypersensitivity

Question 1

what type of reaction is type 1 hypersensitivity

Answer 1

immunoglobulin E (IgE) mediated

Question 2

type 1 hypersensitivity reacts against

Answer 2

environmental antigens (allergens)

Question 3

what happens during type 1 hypersensitivity

Answer 3

IgE binds to crystalline fragment (Fc) receptors on the surface of mast cells;
cross linking causes the release of histamine from mast cell degranulation

Question 4

what are the receptors involved in type 1 hypersensitivity

Answer 4

h1and h2 receptors

Question 5

what does type 1 hypersensitivity increase

Answer 5

chemotactic activity

Question 6

what are the manifestations from h1 receptor

Answer 6

bronchial constriction
edema
vasodilation

Question 7

what are the manifestations from h2 receptor

Answer 7

increases gastric secretions
decreases release of histamine from mast cells and basophils